JEREMY CORBYN made “political history” yesterday after being installed as Labour leadership frontrunner by Britain’s biggest bookies.

Completing a stunning turnaround from 100/1 outsider in May, Mr Corbyn was made favourite by Ladbrokes, William Hill and Paddy Power. And his promotion to pole position came as Unison, which represents 1.3 million public-sector workers, became the latest union to nominate Mr Corbyn. Bookmakers slashed his odds again after the results of a private Labour poll revealed the left candidate is 20 points ahead of his rivals.

It was the third poll in two weeks that shows the principled Islington North MP is on course to shock the political Establishment.